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UCD3138 Datasheet(PDF) 59 Page - Texas Instruments

Part # UCD3138
Description  UCD3138 Highly Integrated Digital Controller for Isolated Power
PDF  99 Pages
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Manufacturer  TI2 [Texas Instruments]
Direct Link  https://www.ti.com
Logo TI2 - Texas Instruments

UCD3138 Datasheet(HTML) 59 Page - Texas Instruments

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10.2.2.2 DPWM Initialization for PSFB
The UCD3138x DPWM peripheral provides flexibility for a wide range of topologies. The PSFB configuration
utilizes the Intra-Mux and Edge Generation Modules of the DPWM. For a diagram showing these modules, see
the UCD3138x Digital Power Peripherals Manual.
Here is a schematic of the power stage of the PSFB:
QT1
QB1
Lr
ISOLATED
GATE Transformer
SYNCHRONOUS
GATE DRIVE
PRIM
CURRENT
T1
T1
VBUS
QT2
QB2
D1
D2
T2
L1
Q5
R2
Q6
I_pri
VOUT
Figure 10-2. Schematic – PSFB Power Stage
www.ti.com
UCD3138
SLUSAP2J – MARCH 2012 – REVISED NOVEMBER 2021
Copyright © 2021 Texas Instruments Incorporated
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